Improved process and apparatus fob the manufacture of acid phosphates



2 Sheets-Sheet 1.

(-1-. P. WILSON. PROCESS OF AND APPARATUS FORTHE MANUFACTURE OF AGIDPHOSPHATES. No.75',831-. Patented Mar. 10, 1868.

WITNESSES.

WNW

INVENTOR.

2 Sheets-Sheet 2.

G. P. WILSON. PROCESS OF AND APPARATUS FOR THE MANUFACTURE OF ACID PHOSPHATBS.

No. 75,331. Patented Mar lO, 1868.

WITNESSES.

77 /ky INVENTOR.

gain?) tats/s gaunt mu.

GEORGE E. WILSON, OF EASTPROVIDENCE, 'R-HODE ISLAND.

Letters Patent No. 75,331, 'olateol March 10, 1868.

time fitgzhulettfettth in in time new haunt m mttiugwnrttnt its same TO ALL WHOM IT MAY CONCERN Be it known that I, GEORGE F. WILSON, of East Providence, in the'conntyof Providence, and State of Rhode Island, have intented a. new and improved 'Mode of Belting Horsfords Acid Phosphates, as described in his patent; and I hereby declare the following to be a full and exact description thereof, reference being had to the accompanying diagram, and to the letters of' reference marked thereon, if The object of this invention is to separate the particles of ground acid phosphates, above referred to,'ot' the requisite fineness, from suchas must again pass under the pulverizcr. This requires the employment of a sieve,

composed of such material as would not be acted upon by the acid, and the disnositionof the sieve, in connect tron with the mill and elevator, in such manner as would make the process continuous.

In my earlier experiments, the sieve was a horizontal box, of which thebottomwas wire gau'ze, to which.

reciprocal motion was imparted, and into which the unequally-powdered.acid was' thrown by the shovclful, and

' aided in its passing through the sieve with a. coarse brush operated by hand. The clogging and corrosion of the gauze, and the necessity oflworking large quantities in little time, led me to construct a silk screen, disposed in the form of an ordinary flour-bolt. It was fed from themill by means of an elevator and chutc.. The line particles, as the bolt revolved, passed through the mcshcs,'and the tailings were discharged at the end to be carried by an elevator and chute back to the hopper of the mill, to be again passed under the stones. The accompanying diagrams show the parts of. the bolt and its connections. '7

Figure 1 showsthe bolt ire-its length, and 4 v Figure 2 the bolt as viewed fro m.'the end, and their more-important connections.

B is the bolt A the chute,-.int o vvhich the'grou'nd acidis delivered by the elevator E, as received from the mill. D is the pin, under the bolt-chamber; D the eud,'whero the tailiugs dischargeintc the chutoF, to be taken up by the elevator E into the chute G, leading to H the hopper of the mill. Y

What I dds'ire to secure by Letters Patent of the United- States, is-

The-improved mechanism for sifting this mixture ofcoarsely and finely-powdcred'acid phosphate of lime, as described under Horsfoids patents, and separating: thecoarser parts of the same, substantially as and for the purpose described.

GEO. F, .WILSON.

Witnesses:

WILLL&M Hanan,

WntsLow Wnmmx, Jr, 

